ipa: rkisp1: agc: Use mode from frame context to calculate new EV

The effective exposure value for each frame is split into shutter time,
analog gain and digital gain based on the AGC constraint mode and
exposure mode. The algorithm uses the modes from the active state, which
tracks the latest queued request, instead of the frame context, which
tracks the value of the controls requested for that frame. Fix it by
using the correct modes.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
Reviewed-by: Paul Elder <paul.elder@ideasonboard.com>

src/ipa/rkisp1/algorithms/agc.cpp

@@ -439,8 +439,8 @@ void Agc::process(IPAContext &context, [[maybe_unused]] const uint32_t frame,
 	utils::Duration shutterTime;
 	double aGain, dGain;
 	std::tie(shutterTime, aGain, dGain) =
-		calculateNewEv(context.activeState.agc.constraintMode,
-			       context.activeState.agc.exposureMode,
+		calculateNewEv(frameContext.agc.constraintMode,
+			       frameContext.agc.exposureMode,
 			       hist, effectiveExposureValue);
 
 	LOG(RkISP1Agc, Debug)